Harvard Physicist Lisa Randall on Hidden Dimensions and New Universes to Explore

It may sound like the stuff of science fiction, but Lisa Randall and her colleagues are expanding the cosmos with hidden dimensions and other universes. The author of 'Warped Passages, Unraveling the Mysteries of the Universe's Hidden Dimensions' talks about her work. Q&A tells explains why we suspect there's a salty ocean under Europa's ice, and What's Up explores the night sky while offering up a Random Space Fact and a new space trivia contest.